(19)
(11) EP 1 178 461 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
30.06.2004 Bulletin 2004/27

(43) Date of publication A2:
06.02.2002 Bulletin 2002/06

(21) Application number: 01306596.6

(22) Date of filing: 01.08.2001
(51) International Patent Classification (IPC)7: G09G 3/28
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 03.08.2000 JP 2000236231

(71) Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
Kadoma-shi, Osaka 571-8501 (JP)

(72) Inventor:
  • Okadu, Taku
    Kadoma-shi, Osaka-fu 570-8501 (JP)

(74) Representative: Crawford, Andrew Birkby et al
A.A. Thornton & Co., 235 High Holborn
London WC1V 7LE
London WC1V 7LE (GB)

   


(54) Improved gas discharge display device


(57) To provide a gas discharge display device that can perform stable write operations for a gas discharge panel and thereby display images with superior quality. A base pulse is applied throughout a write period. The base pulse gradually varies with an approximately constant slope (an average slope of 10V/µsec or less), during an introduction part Ia (i.e. from when the leading edge of the base pulse starts until immediately before the base pulse reaches a constant base voltage Vb) of the write period. A scan pulse Psco is not applied in the introduction part Ia, but is applied after the base pulse reaches the base voltage Vb.






Search report